如何在 terratest 中扮演一個角色

Question

我正在為 terraform 模塊編寫測試用例。 我有一個假設角色，我想將它傳遞給我的 go 測試。 我不知道如何通過它。 我將它定義為一個常量，然后我應該如何傳遞它，以便在 terraform init 和 terraform apply, destroy 期間調用它。

package test

import (
    "testing"

    "github.com/gruntwork-io/terratest/modules/aws"
    "github.com/gruntwork-io/terratest/modules/terraform"
    "github.com/stretchr/testify/assert"
    "github.com/stretchr/testify/require"
)


// An example of how to test the Terraform module in examples/terraform-aws-network-example using Terratest.
func TestTerraformAwsNetworkExample(t *testing.T) {
    t.Parallel()

    const authAssumeRoleEnvVar = "TERRATEST_IAM_ROLE"

    // Give the VPC and the subnets correct CIDRs
    vpcCidr := "1x.x.x.x/20"
    Env := "staging"
    privateSubnetCidr := []string{"1x.x.x.x/30"}
    publicSubnetCidr := []string{"1x.x.x.x/30"}
    Tag := map[string]string{"owner":"xxx"}
    awsRegion := "us-east-1"

    terraformOptions := &terraform.Options{
        // The path to where our Terraform code is located
        TerraformDir: "..",

        // Variables to pass to our Terraform code using -var options
        Vars: map[string]interface{}{
            "vpc_cidr":       vpcCidr,
            "env": Env,
            "private_subnet_cidrs": privateSubnetCidr,
            "public_subnet_cidrs":  publicSubnetCidr,
            "tags" : Tag,
        },

        EnvVars: map[string]string{
                 "AWS_DEFAULT_REGION": awsRegion,

        },
    }

    // At the end of the test, run `terraform destroy` to clean up any resources that were created
    defer terraform.Destroy(t, terraformOptions)

    // This will run `terraform init` and `terraform apply` and fail the test if there are any errors
    terraform.InitAndApply(t, terraformOptions)

    // Run `terraform output` to get the value of an output variable
    publicSubnetId := terraform.Output(t, terraformOptions, "public_subnet_ids")
    privateSubnetId := terraform.Output(t, terraformOptions, "private_subnet_ids")
    vpcId := terraform.Output(t, terraformOptions, "vpc_id")

    subnets := aws.GetSubnetsForVpc(t, vpcId, awsRegion)

    require.Equal(t, 2, len(subnets))
    // Verify if the network that is supposed to be public is really public
    assert.True(t, aws.IsPublicSubnet(t, publicSubnetId, awsRegion))
    // Verify if the network that is supposed to be private is really private
    assert.False(t, aws.IsPublicSubnet(t, privateSubnetId, awsRegion))
}

Answer 1

**

這段代碼是不可測試的，所以你不能測試它。

** https://github.com/gruntwork-io/terratest/blob/f3916f7a5f58e3fedf603388d3e3e8052d6a47a3/modules/aws/auth.go#L18

我希望他們可以像這樣重構它：

var AuthAssumeRoleEnvVar string

func SetAuthAssumeRoleEnvVar(role string){
    AuthAssumeRoleEnvVar = role
}

func NewAuthenticatedSession(region string) (*session.Session, error) {
    if assumeRoleArn, ok := os.LookupEnv(AuthAssumeRoleEnvVar); ok {
        return NewAuthenticatedSessionFromRole(region, assumeRoleArn)
    } else {
        return NewAuthenticatedSessionFromDefaultCredentials(region)
    }
}

這樣我們就可以這樣稱呼它：

aws.SetAuthAssumeRoleEnvVar("testrole")
aws.NewAuthenticatedSession(region)

Answer 2

如文檔中所述，將此變量 TERRATEST_IAM_ROLE 作為 os 環境變量傳遞的唯一方法您也可以將其定義為后端文件，但如果您有讀取值的斷言測試用例，則不會被選中，因為它使用 aws cli

所以我做了一些這樣的事情，它奏效了。

import (

    "os"


)
 os.Setenv("TERRATEST_IAM_ROLE", "arn:aws:iam::xxxx/xxxx")